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I bought my 1997 JD770 last year at 510 hours. A previous owner had the 500 hour service done by a local, independant tractor mechanic a year before I bought it. I noticed that the hydraulic oil was still red and I have since learned that that usually means that is the originial fluid put in...

I had somebody mention to me that to raise the front end of my tractor with the bucket cylinders fully extended (see picture) might bend the bucket cylinders. He suggested that I place the cutting edge of the bucket directly on the ground so that the bucket cylinders are not fully extended. 1...

I have a 1997 John Deere model 70 loader on my JD770 tractor. One of the boom cylinders (right side) drips hydraulic fluid where the rod enters the cylinder. As far as I can tell, it doesn't drip or leak when I am using the loader (the rod is dry). After I shut the tractor off it drips about...

After the rockshaft lift arms are fully raised they have a free travel. I have the service manual for my JD770 that gives a procedure to adust the amount of free travel. However, the procedure is written for the JD1070 (270-15-17)only and it gives a free travel spec for that tractor of 5-9mm...